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English

RA‑1520 Stereo Integrated Ampliﬁer

8 9

English

RA‑1520 Stereo Integrated Ampliﬁer

To program for the RT-940AX: press the POWER button and

the 2 button simultaneously.

To program for the RT-1080/RT-1082/RT-1084: press the

POWER button and the 1 button simultaneously.

Remote Sensor 3

The remote sensor receives infrared signals from the remote control.

Do not cover or block the sensor. It must be unobstructed or the remote

control will not work properly.

The operation of the remote sensor can also be affected if it is exposed

to bright sunlight or certain types of lighting (such as halogen lights) that

emit infrared light. In addition remote control functions may not work

reliably if the batteries in the RR-AT94 are weak.

Note: To use the remote, aim it at the remote sensor on the front

panel of the RA-1520.

Remote Control Batteries

Two UM-4/AAA size batteries (supplied) must be installed before the

remote control can be used. To install the batteries, remove the cover on

the back of the RR-AT94. Install the batteries as shown in the illustration

in the battery well. Test the control for proper operation, then replace the

cover. When the batteries become weak the remote control won’t operate

the RA-1520 consistently. Installing fresh batteries should eliminate the

problem.

EXT REM IN Jack r

The 3.5 mm mini-jack labeled EXT REM IN can receive command codes

from a third-party infrared receiver or Rotel remote zone keypad. It

can be used with an outboard IR receiver to duplicate the front panel

IR sensor. This feature is useful when the IR signals from a hand-held

remote control cannot reach the front panel IR sensor, for example if unit

is installed in a cabinet and the front panel sensor is blocked, or when IR

signals need to be relayed to other components.

Consult your authorized Rotel dealer for information on external

receivers and proper wiring of 3.5mm mini-plugs to ﬁt the REM IN jack.

Note: The IR signals from the EXT IN jack can be relayed to

source components using external IR emitters or hard-wired

connections from the IR OUT jacks. See the following section for

additional information.

IR OUT Connection t

The 3.5mm IR OUT jack sends IR signals received at the EXT REM IN jack

to an infrared blaster or emitter placed in front of a source component’s

IR sensor. In addition, the IR OUT connection can be hard-wired to Rotel

CD players, DVD players, or tuners with a compatible connector.

For example, this allows the RA-1520 to pass along IR signals when

the sensors on the source components are blocked by installation in a

cabinet.

See your authorized Rotel dealer for information on IR emitters and

repeater systems.

Note: Remove the batteries from the remote if it will not be used

for a long period of time. Do not leave run down batteries in

the remote control; they can leak corrosive chemicals which will

damage the unit.

Speaker Outputs

See Figure 3

The RA-1520 has two sets of speaker outputs, labeled SPEAKER A and

SPEAKER B. The speaker outputs are controlled by the switch on the front

panel.

Speaker Impedance

If only one set of speakers will be used at any given time, the speakers

may have an impedance as low as 4 ohms. If there are times when

both the A and B speakers will be used, all the speakers should have an

impedance of 8 ohms or more. Speaker impedance ratings are less than

precise. In practice, very few loudspeakers will present any problems

for the RA-1520. See your authorized Rotel dealer if you have any

questions.

Speaker Wire

Use insulated two-conductor stranded wire to connect the RA-1520 to

the speakers. The size and quality of the wire can have an audible effect

on the performance of the system. Standard speaker wire will work,

but can result in lower output or diminished bass response, particularly

over longer distances. In general, heavier wire will improve the sound.

For best performance, you may want to consider special high-quality

speaker cables.Your authorized Rotel dealer can help in the selection of

cables for your system.

Polarity and Phasing

The polarity – the positive/negative orientation of the connections – for

every speaker and ampliﬁer connection must be consistent so all the

speakers will be in phase. If the polarity of one connection is reversed,

bass output will be very weak and stereo imaging degraded. All wire

is marked so you can identify the two conductors. There may be ribs

or a stripe on the insulation of one conductor. The wire may have clear

insulation with different color conductors (copper and silver). There may

be polarity indications printed on the insulation. Identify the positive and

negative conductors and be consistent with every speaker and ampliﬁer

connection.

Speaker Connections []

Turn off all the components in the system before connecting the speakers.

The RA-1520 has color-coded speaker connectors on the back panel.

These connectors accept bare wire, or connector lugs. (In non-EC

markets, the connectors also accept dual banana plugs.)

Route the wire from the RA-1520 to the speakers. Give yourself enough

slack so you can move the components to allow access to the speaker

connectors. If you are using dual banana plugs, connect them to the

wires and then plug into the backs of the binding posts. The thumbscrews

of the binding posts should be screwed in all the way (clockwise).

If you are using terminal lugs, connect them to the wires. If you are

attaching bare wires directly to the binding posts, separate the wire

conductors and strip the insulation from the end of each conductor. Be

careful not to cut into the wire strands. Unscrew (turn counterclockwise)

the binding post thumbscrews. Place the connector lug or wire around

the binding post shaft. Turn the thumbscrews clockwise to clamp the

connector lug or wire ﬁrmly in place.

Note: Be sure there are no loose wire strands that could touch

adjacent wires or connectors.

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